Diagram of CARS Apparatus (IMAGE) Moscow Institute of Physics and Technology Caption A diagram of the CARS apparatus used by the scientists to detect the small protein crystals. Two laser beams (Laser 1 and Laser 2) intersect on the sample. The signal received from the highlighted region passes through several filters (including a polarizer) and hits a detector. With further processing, scientists are able to say whether there is a protein crystal in the region or not. Credit Image courtesy of MIPT Press Office. Usage Restrictions With proper attribution License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.